USA As Represented by Secretary of the Navy

Everett W Sappenfield

Gregory Knowles Fleizach

Mark William Owen

Erin L Daly

Warran Ho Can

Methods for characterizing radar can include the steps of receiving a plurality of radar emissions, and determining a plurality of Pulse Repetition Intervals (PRIs) corresponding to the emissions. A plurality of clocks Xcan be calculated using the PRIs. A clock range and a clock interval can be defined for the plurality of calculated clocks Xand a clock X can be estimated, but only for the clocks Xthat are within the defined clock range. Countdowns Ccan be determined using the calculated clock X, and a mode M and crystal b can be calculated based on C. Clock X, countdowns C, mode M and crystal b, when considered together can accurately characterize a specific radar emission (and radar the emission came from). The systems and methods can be accomplished using emissions that are being received in real time using a receiver and emissions data from a database simultaneously.

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San Diego, CA, United States of America

Everett W Sappenfield